Circle Equation

Question

3 x^2+3 y^2-30 x-18 y +27=0 is the equation of a circle with center (h,k) and radius r for:

 

h = ?

k = ?

r = ?

Answer 1

=

The given equation can be written in simplified form as follows-----

 

x^2+y^2-10x-6y+9=0

 

(x-5)^2 + (y-3)^2.  -25 -9 +9=0

 

(x-5)^2 + (y-3)^2 = 25=5^2

 

h=5

k=3

r =5